I would second fiddle_wood’s concerns about set up.
A mandolin is much harder to set up than a banjo as it will almost inevitably involve cutting the nut.

Pac-rim (so Eastmans, Kentuckys and The Loars) mandolins usually ship to dealers without a set up and with the nut cut very high which makes the eight strings much harder to play. You’ll need feeler gauges and nut files to cut the nut properly so it is not so easy to do at home.